Valve



Feb. 26, 1952 H, w, MCPHERSON 2,537,357

VALVE Filed Aug. 6, 194'? Tif- INVENToR. HAZ W /VCP/ff/Pa/V Patented Feb. 26, 1952 VALVE u Y Hal. W;Mcl?he1'son,` Ghicago, Ill., assignor to The Skinner Chuck Campana Norwalk,` Conn.,` a corporationfof Connecticut Application August-6, 1947, serial No1. 766,668

This invention relates to valves and more especially rto solenoid-operated-Valves.

An object of this invention is a valve in Awhich theY pressure ofthe iluid to be-controlledis utilizedA under :the control of' a solenoid-actuated valve to determine the setting -of the Valve whereby a small solenoidmay beY utilized to control ow through a large ori-lice.

A further object of this invention is a three- Way valve vin which thev pressure inlet can be at either the normally openorthenormally closedl port and may be easily converted into a two-.way valve by lclosing one outlet port.

It is a still further object of' this invention to provide Va magnetically Voperated pilot v alve which is unfailingly reliable in operation 1n a wide variety of conditions of temperature, pressure and the like.

Other objects, novel Vfeatures andadvantages of this invention will become apparent from the following specication and accompanying drawings, wherein:

Fig. 1 is a vertical vsection througha embodying the invention, and

Fig. 2 is a section on the linev2-f2 of Fig. l.

The body II is formedk with two recesses, vone of which cooperates with a, cover I2 attached to the body by the bolts I3 toform a chamber I4 while the other cooperates with a cover I5 attached to thebcdy by bolts IG to form a chamu ber I1. The two chambers are connected by a passageway I8 with which communicates a, port I3 while a port 20 communicates with the cham ber I4 and a port 2| communicates with Athe chamber I1. At the ends of the passageway I8 are formed valve seats 22 and 23 respectively.

A valve stem 24- extendsthrough 'thepassageway I8 .and is slidably supported: by the covers I2 and I5. The valve' stem 24 is formed with the collars 25 and 26 against which are held valve heads 21 and* 28 respectively'for cooperation with the valve seats 22 and 23. The valve head 21 is mounted in a two-part holder 42li-to which also is attached a ilexiblc diaphragm 3,0, the periphery of which is gripped between the body II and the cover I2.- A nut 3| threaded `on the valve-stem 24 engages the outer face of the holder 29 to maintain the holder, diaphragm and head 21 in assembled relation. The valve head' 213v is received in a holder 32 and a nut33 threaded .on the valve stem 24 retains the holder of the valve head in assembled relation.

A recess 34 is formed in-'the body II and'has a smaller diameter extension35= which communicates with a passageway 36 extending between the chambers I4 and' I1. 'In the extension ySI5 is valve 2 arranged a tubular plug 31 of resilient 'material and ofA less diameterr than the extension. VA passageway 38 in the body II andcover I2=pro vides communication between the recess 34 'Tand the left-hand compartment ofI the chamber I4. Aninsert 39 inthe recess 34 has a central passageway 40 communicating at one end with the extension 36 and is formed at its other end with a valve seat 4I. Y

In the-upper portion of the recess 34V is fitted an annulus 42 towhich is attached a nonmagnetic sleeve 43. In the sleeve 43 is slidably mounted a magnetic core 44 provided at-itsopposite ends with Vresilient insets 415i and 46; the former of which cooperates with the valve'- seat 4I. In the upper end-of the sleeve-43 is mounted a magnetic plug 41 formed with a uid relief passageway 48 at the lower end of which the plug is formed to provide a valve seat 43. An-annulus 50 rests on the annulus 42 and is held in such position b y a cap 5I suitably attached tonthe body Il. Within the cap- 5I is located anrel'ectrornagnetic coil v52surroundi1f1g the sleeve-4'3. v'Al spring 53 biases the core 44 to engage the inset 45 with the valve seat 4I Ythereby closing the passageway through the inset.3 9.

In voneuse of the above-described valve, a.V source of fluid under pressure is connected: to the port 23 and rthe portA I9 is connected` to a fluid pressure motor or the like while the port 2I` is connected tofa dischargel pipe. With the coil cle-energized, the valve head Y.28'is heldin engagement with the valve seat 23 by thegreater lef-tward directed force acting. upon the valve stem 24 due to the greatersarea of the diaphragm 3B over the valve head 28. The member 3111s held inposition to seal that portion vof the .passageway 3S leading to the chamber I1,.and the inset 45is held on the valve seat 4I by thespring 53. Fluid fiows from the port 2Il-th1tough vthe passageway I8 to the port .I9 .untiltheiiuid'pressure motor has been fullyactuated. Energizetion of the coil 52 lifts the core 44 to engagezthe inset-43 with` the valve seat 49 and-to disengage theinset 45'fromthe valve seat 4i. therebyper.- mitting uid, now through the passageway 38 into the left-hand compartment of the chamber .I4 to disengage the `valve .head 28;y from. the ilralve seat 23 and .engage the `valve head v211 with `the valve seat 22 underthe greater rightward torce acting on the valve stem v24 due to the excessin area ofthe left-hand side Aof the diaphragniand the'valve head 28 over the area .of thegrightfhand side o f' the diaphragm. f Comma; ric,a1', iorl is thus cut ,oir between the port 20 andthe port I9 and is established between lthe port I-sand the zport 2l to permit fluid fiow from the fluid pressure motor to the drain pipe. The position oi the member 31 remains unchanged. Upon de-energization of the coil 52, the core 44 returns to its original position to seat the inset 45 on the valve seat 4| and disengage the inset 46 from the valve seat 49, thereby permitting flow from the left compartment of the chamber I4 through the passage 38 to the passage 4d. The original force differential is re-established on the diaphragm 3J to return the valve stem 24 to its original position in which the head 21 is disengaged from the valve seat 22 and the valve head 28 is engaged with the valve seat 23 thereby again putting the port. 2U in communication with the port I9.

The valve may also be used by connecting the port 2| to a source of fluid under pressure and the port 28 to a drain pipe with the port I9 connected to a fluid pressure motor. With such connections, the member 31 is held in position to close that portion of the passageway 3i leading to the chamber I4. The valve is now a normally closed valve rather than a normally open valve.

Energization of the coil 52 sets the valve to permit liquid to fiow to the fluid pressure motor while de-energization of the coil sets the valve to permit liquid to escape from the motor.

By plugging the port 2 I, the valve may be converted into a normally open two-way valve. By plugging the port 2, the valve may be converted into a normally closed two-way valve.

I claim:

1. A valve comprising a body defining first and second chambers and a passageway interconnecting said chambers, said passageway having first and second valve seats for controlling fluid now between said passageway and said first and second chambers respectively, a flexible diaphragm in saidriirst chamber dividing it into a first compaftment in communication with said passageway and a second compartment isolated from said passageway except through the hereinafter mentioned first duct means, a reciprocably supported stem connected to said diaphragm having valve members cooperating with said seats, said stem and valve members being adapted in different positions to close one of said seats and maintain the other open, ports communicating with said chambers and with said passageway, first duct means for providing communication between said'first and second compartments, a relief passageway communicating with said second compartment, second duct means for providing communication between said second compartment and said second chamber, a valve for selectively controlling fluid fiow from said second compartment to said relief passageway or from said first and second duct means to said second compartment, and means for interrupting communication in one of said first and second duct means while opening communication Yin the other thereof.

2. A valve comprising a body defining first and second chambers and a passageway interconnecting said chambers, said passageway having first and second valve seats for controlling fluid flow between said passageway and said first and second chambers respectively, a flexible diaphragm' in said first chamber dividing it into a first compartment in communication with said passageway and a second compartment isolated from said passageway except through the hereinafter mentioned ducts, a reciprocably supported stem connected to said diaphragm having valve 75 members cooperating with said seats, said stem v the said second and third ducts into said second compartment through said iirst duct or from said second compartment to said relief' passageway, and a movable seal operable to interrupt communication between said nrst duct and one of said second and third ducts while opening com- Y munication with the other thereof.

3. A Valve as in claim 2 in which said seal comprises a pressure responsive member responsive to pressure in said second chamber to seal said second duct, and responsive to pressure in said first compartment to seal said third duct.

4. A valve comprising a body defining first and second chambers and a passageway interconnecting said chambers, said passageway having first and second valve seats for controlling fiuid flow between said passageway and said rst and secondchambers respectively, a flexible diaphragm in said first chamber dividing it into a first compartment Yin communication with said passageway and a second compartment isolated from said passageway except through the hereinaiter mentioned first duct means, a reciprocably supported Vstem connected to said diaphragm having valve members cooperatingwith said seats, said stem and valve members being adapted in different positions to close Vone of said seats and maintain the other open, ports communicatingV with said chambers and with said passageway, first duct means for providing communication between said first and second compartments, a relief passageway communicating with said second compartment, second duct means for providing communication between said second compartment and said second chamber, a valve for selectively controlling fluid flow from said second compartment to said relief passageway or from said first and second duct means to said second compartment, and meansfor interrupting communication in one of said first and second duct means while opening communication in the other thereof comprising a pressure responsive member responsive to pressure in said 1 second chamber to interrupt communication in said first duct means, and responsive to pressure in said first compartment to interrupt communication in said second duct means. Y HAL W. MCPIERSON,

REFERENCES CITED UNITED STATES PATENTS Number Name Date 1,583,642 Bailey May Li, 1926 2,218,861 Stumpf Oct. 22, i948 2,335,923 Dube Dec. 7, 1943 2,427,471 Osgood Sept. i6, 1947 FOREIGN PATENTS Number Country Date 104,988 Sweden of 1942 216,984 Switzerland of 1942 586,501 Great Britain Mar. 20, 1947 

